adoroszlai commented on code in PR #7495:
URL: https://github.com/apache/ozone/pull/7495#discussion_r1992002919
##########
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/protocol/DatanodeDetails.java:
##########
@@ -175,6 +178,34 @@ public void setIpAddress(String ip) {
this.ipAddress = StringWithByteString.valueOf(ip);
}
+ /**
+ * Resolves and validates the IP address of the datanode based on its
hostname.
+ * If the resolved IP address differs from the current IP address,
+ * it updates the IP address to the newly resolved value.
+ */
+ public void validateDatanodeIpAddress() {
+ final String oldIP = getIpAddress();
Review Comment:
```
NullPointerException: Cannot invoke
"org.apache.hadoop.ozone.util.StringWithByteString.getString()" because
"this.ipAddress" is null
```
Sorry, it looks like we need to handle `ipAddress == null` case in
`getIpAddress()` and `getHostName()`.
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